Abstract:Hujiatan waterway is a bending and broadening reach located in the upper reaches of the Yangtze River.This paper studies the bed evolution characteristics,navigation-hindering features,and formation causes of Hujiatan shoal waterway,and puts forward the waterway regulation ideas and schemes.The regulation effects are analyzed using 2-D flow and sediment mathematical model and based on the flow and sediment data of year 2002 to 2011.The results show that after the regulation,the navigation channel flow velocity increases and the reaches will not turn into rapids.Moreover,in the water level fluctuating period,the channel sediment erosion strengthen,the scour starting time advanced and the erosion duration prolonged.Correspondingly,the channel scale meets the design requirements and can remain stable,which indicates that the combined methods of construction of dikes,dredging and reef blasting are effective to Hujiatan shallow shoal regulation.